package exception;

public class TryCatchDemo {
    public static void main(String[] args) {
        System.out.println("程序开始了");
        try {
            String line = "1234";
            System.out.println(line.length());
            System.out.println(line.charAt(3));
            System.out.println(Integer.parseInt(line));
            System.out.println("!!!!!!!!!");
        }/*catch (NullPointerException e){
            System.out.println("出现了空指针，并且处理完毕了");
        }*/ catch (NullPointerException | StringIndexOutOfBoundsException e) {
            System.out.println("出现了空指针或字符串下标越界，在这里一并处理了");
        } catch (Exception e) {
            System.out.println("出现了一个未知错误！");
        }
        System.out.println("程序结束了");
    }
}